Author to whom all correspondence should be addressed. e-mail: cfreeman@sun.science.wayne.edu

ABSTRACT

Heterocarpy is often associated with different flower morphs. However, in Calendula micrantha, a monoecious member of the Asteraceae, all six fruit morphs arise only from ray flowers. The maternal investment differs markedly among the fruit morphs, as does the growth, size and competitive ability of the resulting seedlings. The fruit morphs appear to be adapted to different conditions, as there were profound differences among the progeny of different morphs raised at different densities and in different watering treatments.

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